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We demonstrate ultrabroadband THz wave detection using a photoconductive antenna with a combination of an ultrashort pulsed laser with 5 fs pulse duration and a DAST crystal. We successfully detected an extremely wide frequency range from 0.5 to 170 THz.
We demonstrate highly sensitive coherent detection of a monochromatic THz-wave pulse at room temperature using the frequency up-conversion in MgO:LiNbO3 combined with balanced homodyne detection. Both the intensity and phase of THz radiation are measured.
We demonstrate ultrabroadband THz field detection with a photoconductive antenna using a combination of ultrashort laser pulses of 6 fs duration and a DAST crystal. We successfully observed ultra-high frequency component beyond 170 THz in near-infrared region.
Terahertz technology is a potentially useful tool for biosensing applications. Previous reports proved to be effective in detecting the signature spectrum of some molecules. In this study, which analyzes the terahertz transmission characteristics of bimolecular samples in solution, we propose a membrane device to hold a sample in solution. This device allows preparation of small sample amounts and...
We have developed a high sensitive biological sensor chip using a transmission line type terahertz device. The device was based on a transferred low temperature-grown GaAs layer that was bonded onto silicon substrates. Photoconductive switch elements for generating and detecting THz signals are fabricated on the LT-GaAs layer. The sensor chip has a round reservoir on a 1 mm long microstrip transmission...
We have developed a novel process of transmission line type terahertz (THz) devices for biological sensing. A low-temperature-grown (LT) GaAs layer side is bonded onto silicon substrates using Au-Sn solder, then the GaAs substrate is removed by selective wet etching. Photoconduetive switch elements for generating and detecting THz signals are fabricated on the transferred LT-GaAs layer. This process...
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